Automatically-threading loom shuttle



Dec. 16, 1930. c. D. BROWN AUTOMATICALLY PI-[READING LOOM SHUTTLE Filed Feb- 25, 1930' 2 Sheets-Sheet l VENTDR" PM 'uv MT.

ATTORNEY Dec. 16, 1930. c. D. BROWN 1,785,220

AUTOMATICALLY THREADING LOOM SHUTTLE Filed Feb. 25, 1950 2 Sheets-Sheet z 1 Y m fl w: W 3 T a pi 2 m fl w w T m a a M T Y a a-ndth li-ke. e 20 It has beerr'proposed "heretofore to -pro- Vi'de e rigid tens-ioning -n'iember--extendi;ng lengit-udi'na-lly ofthe shuttle and about Which Patented Dec. 16, 1930 .emromA'rrcnLtirnnn'irbine ilobM srrif'iirtn v l his i-nvlention-rela;tes- 'to automatically threading: shuttles *and is 'rnore'particr'ilarlydirected' to means for exerting; uniform tens1on on the thread during" Weav ng.

5 In :order :thfat perfet jclothqnaybe Woven, 7 :the "tension exertulomthe thread following replenishment: of -filling sh'ould---be: the same on-the first-pick oftt'he shiittle as exists during subsequent weaving, and many attempts 10' have-beenmadetesecure? this re'sult butwith onlypartiel suecss it atall. "Shouldthe ten-' sion on the' thre'atdduring the first} 'pick of 'servethe desi-re d-purposeof rnzt'intaining unithe i shuttle -folldwing replenishment difler --'from that during subsequent Weaving; which isus'uilly the 'case; the lack -of-uniform "tenespecially whenweaving jwith ioerta-in kinds- Y of filling, sueh as s-ilk, airtifiezialsilkfrityon the-thread i's Wigeppecl: in one 017% more turns on the first pickiof the shuttle folloWi-ngreplenishment; but in such T case "reliance is --plneed entirelyupon the frictionahen-gage- Inent'of the thread with the rigid Dur-L-Z eburse-abeu't the tensioning members.

ing Weaving hovvever the threa'dqwill at dimes-exert apullfrom the shuttle end at other times become -slack: so that'- the rigid arm heretofere e nployed will not function to take np the slaok thread; with the result 1 th at frequently the tension will Wary during the'pioki-n g movements {of theshuttle;

shuttle With-a, plurality oftensioning membersextending longitudinally ot the shuttle -andabout 'Which---asa -unit the" thread is y 49 passed or -wrappedfi on the first pick of the "shuttle-following replenishment, andrto pro- Videatleast-one of=-the'; 3lura1ity oftension wing -mer nbers-'with resiliencyor yielding =--On"eof the objects ofthe-present invention is to provide an eutomatieallythreadingloom- --end or }m embers,-'= so' that during the weaving 50peration, the-tension-ing -mernbers "may yield Withinthethread windings d-uring the pull ot-thethread and then act to take upslack.

In-carrying* the invention intoi effect,- -thee 50 1 plurality of tensioning -n1e1nbers have their ends which areremotetroin:thebobbin cham- -ber secu red'to the shuttle, froni which point the tensioningmembersextend towards the bobbin chain-her, where-their; ends are free o so-that rel-ativeinovement ofthe-* tensioning --memberstowards end-from each other will weevingtoperetion.

f As a -furtherfeature of-the 'presentintenw'tion, EL -thread director is provided at the free :end portions of the tensioning -1n'embers to 'direct the swirling thread 'aboutth'e tension- Ijnernber-s as e'unit when the shuttle is first; piekedZ-folflowihg repleni'sl1n1ent,- and =the Ethread director is "so! constructed that when thethreadhas been Wrapped about the plurality-of tensioning hiernbere it; will 'enter tofwerds the central portion of the thread director and therealfter leed throughthe-lonrgitudi nal passage-in a {serpentine or spi-ral The-invention and novel Y features-thereof of one gOOdy-Prdcti eal formthereof.

:"InJt/he drawings:

Fig. l is e-pl an view of an automatically t-breeding shuttle provided with the present;

i'nventionf sorne 0f theparts" being broken EigQ 2*is-a -transverse sectionmn' the line 2 2 of Fig; 1;

Eig,l3 -is a long-itudinal section on' the line Wrapped about --t-he tensioning members;

Eig.- i -is a view; similar to that of Fig. 1, showing a modified fornfiof the invention Fig. 5 is a plan view of the modified form of the invention with parts broken away and showing the shuttle as completely threaded.

The shuttle 1 may be of the usual filling replenishing type provided with the bobbin chamber 2 in which the bobbin 3 is detacha-bly supported in order to permit replenishment by the transfer of a fresh filling carrier or bobbin in the shuttle and the ejection of the spent one, but since such form of the replenishing shuttles is now well-known, further description and illustration of these features are unnecessary.

Forward of the bobbin chamber 2 is the longitudinal thread passage 4, and communicating with the thread passage is the side delivery eye 5, and these parts may be of usual character.

Filling 'eplenishing shuttles which are an tomatically threaded during the loom operation are usually provided with a threading block, of which there are many types, so that on the first pick of the shuttle following replenishment the thread may enter the longitudinal thread passage and thus become partially threaded, and on the next pick of the shuttle the thread may be passed for delivery to the side delivery eye. The threading block 6 is shown as a top plate which is secured to the shuttle by a screw or bolt 7 passed through a side projecting flange of the top plate, and from said flange the top plate extends forwardly to form a thread deflector 8 between which and the shuttle body is a passage 9 leading to the side delivery eye. The top plate, in the present instance of the invention, extends towards one side of the longitudinal thread passage where an opening 10 is formed to permit the thread to pass downwardly from the top plate into the longitudinal thread passage on replenishment of filling, as indicated in Fig. 1, where it will be noted that the thread a leading from the filling carrier or bobbin is passed downwardly from the top plate into the longitudinal passage, the shuttle being shown as having been supplied with a fresh filling carrier or bobbin having thread wound thereon. The construction thus far described may he of any usual character to effect preliminary threading of the shuttle on the first pick thereof following replenishment.

Mounted on the shuttle are the tensioning' members, the ends of which remote from the bobbin chamber are secured to the shuttle, and the ends adjacent the bobbin chamber are free, and while two such tensioning members are shown in the present instance of the invention, there may be any convenient number. In any case, however, one at least, of the tensioning members shall be-yielding or resiliently movable towards and p from the companion tensioning member or members.

As shown in Figs. 1, 2 and 3, the tensioning members 11 and 12 extend longitudinally of the thread passage and are preferably, though not necessarily, provided with bends, as shown, throughout the main portion of their length. The ends of the tensioning members remote from the bobbin chamber are mounted upon a screw or pin 13 which extends upwardly at the frontward end of the thread passage, as shown, and is held in place by the nut 14. The ends of the tensioning members remote from the bobbin chamber are turned about the pin or bolt 13, as indicated at 15 and 16, and are clamped in place on the pin or bolt by means of an internally threaded sleeve 17 which serves to secure the ends of the tensioning members re mote from the bobbin chamber in fixed position.

In the present illustration of the invention, the pin or bolt 13 and clamping sleeve 17 are disposed at one side of the longitudinal center of the thread passage, and in such case the end portions of the tensioning members extend from the bends 15 and 16, as shown by dotted lines, Fig. 1, at 18, and from the ends of the portions 18 the tensioning members 11 and 12 extend longitudinally of the thread passage towards the bobbin chamber where their ends are free or unconnected with the shuttle.

At the free end portions of the tensioning members there is a thread director, the function of which is to cause the swirling thread on the first pick of the shuttle following replenishment to be guided about the plurality of tensioning members as a unit, as indicated in Fig. 3. The thread director may be variously contrived but in the present instance of the invention it is formed of a generally circular or curved member 19 which is accured to one of the tensioningmembers, as, for instance, the tensioning member 11, as indicated in Fig. 1, and the other tensioning member 12 is unconnected with the thread director but extends therethrough, and may be provided with a knob or enlargement 20 to insure the continuous operative position of parts.

The thread director, as more clearly shown in Fig. 2, consists of a curved member carried by the tensioning member 11, and provided with an opening 21, whereby when the thread has been wrapped about the tensioning members as a unit on the first pick of the shuttle following replenishment, the thread will be directed through the opening 21 and there after lead through the thread director to the w 'appings on the tensioning members.

Since one of the purposes of the present invention is to provide for yielding movement of the tensioning members relatively within the wrappings of the thread to respond to the pull of the thread during weaving and maintain tension thereon, and to talie up slack when the thread is relieved of pull, the tensioning members, or at least one of them, are

lilii m de. esilient, As shownlia he pr ntan erf t invention there a e t im ten ioning members 11 and 12, andboth of them are resilient, but hi ma l -Pi al a ssary n e. s il eney f; s e; s nt in some instances.

In the modificationshuwnby ,Figsl Land ,,the ten i ni gamen b r are, er i y; of substantially-the same; character; as shown by Figs. 1, 2 .a'ndi3, but insteadofmounting both of the tensioning members upon the pin ever, the companion tensioning member .12,

which is generally similar to the corresponding tensioning member of Figs. ,1, 2 and 3, has its end remote from the bobbin chamber turned outwardly at 22, and its end portion securedby a screw or bolt .23 in a recess 24 formedinthe side wall of the shuttle. In thiscase the end 22is pivotally supported by the screw orbolt 23 audits terminal portion is bent outwardly at 25 where it is secured to a spring member 26 which may be conveniently formed asa rubber strip the opposite end portion of which isconnectedto a bolt or screw 27, as indicatedmore clearly in Fig. 5, with the result that the tension exerted on the tensioning member 12 maybe adjusted at times by turning the bolt or screw27.

Where the tensioning. member 12 is mounted as just described, it may be desirable in mostinstan ces .to place ,a or covering 28over the'recess 2a in the sidewall of the shuttle. f f

In themoclified. formpf the invention, as in the praised f rm, the hread e o 19 is carried by the free end of the tensioning member .11 and the free end of the tensioning member 12 eXtends through the thread director 19, as indicated in, Fig. 4,.and beyond the thread director the tensioning member 12 is provided with. an enlargement 20 as in the preferred form of the invention.

lVhen filling replenishment is effected, the thread airomthe filling carrier or bobbin will pass below the top plate oftlie threading block into the longitudinal thread, passage, and when the shuttle is picked follou ing replenishmentthe swirling thread will be guided by the director 19 about the plurality of tensioning members as a unit and thecoils of the thread, will take a spiral it'ormation, as indicated in Figs. 3 and.5,"abo ut thejtwo tensioningmembers and beheld in their spiral el t e h t nde i 1 Wh n m e of turns of t ead have been; wrapped abou t e e ia s m m er-S nd e} thread from a near the: free ends. 1 of the i tensionin g members, itwill then be directed by the thread director. '19 through the, opening 21 thereof, with the result that the thread will thereafter lead through the thread director as indicated in Figs. 3 and 5. r

During the weaving operation, the tension ning members 11 a11d12 will exert a certain N amountlof frictional retardation to thewith- ,drawal of the thread from the shuttle-by reasonMof the v thread wrappings about the .plurality oftensioning members and by. their relative yielding movementtowards and from each other they, or one of them, will be deflected so as to exert a yielding action upon the thread,and thetensioning members will thereupon move to a more or less deg-recto- Wards each otherfthereby yielding to the thread pull, asindicated in Fig. 5. lvhenthe thread becomes slack, however, the tensioning members will separate relatively and thereby take up slack, so that during the entire weaving operation the relative resiliency of the tension-mg members. will maintain ztension.

upon the thread and also act to take up slack.

It may be desirable to guidethe thread "from the longitudinalthread passage to the sidedelivery eye and this may be readily effected bya post, which is furnished in the present instance. of the invention by the clamping sleeve 17 which is located near the "side delivery eye andabout whichthe thread may lead, as indicated in Figs. 3 and 5. hat is claimed is; a i l 1. An automatically threading loom, shuttle haying a. bobbin chamber, a longitudinal thread passage and a side delivery eye communicating therewith, a plurality oft-bread tensioning members constituted as armseX- tending longitudinally of the thread passage in spaced relation toeach other and having their. ends remote from the bobbin chamber secured to the shuttle and their ends adjacent the bobbin chamber freethat the swirling threadmaybe wrapped. about the plurality of spaced tensioning'members as a unit b the swirling our-evolving move ment oft e unwinding thread when l the 'shuttlejis picked and the tensioning menrbers act within the thread Wrappings under the pull of the thread and take up slack. 4

2. An automatically threading loom shuttle having a bobbin chambena longitudinal thread passageand a side delivery eye com municating therewith, a plurality of thread tensioning members constituted as arms extending longitudinally of the thread-passage having their ends frem ote from the bobbin chamber secured to the shuttle and. their.

ends adjacent. the bobbin chamber free that the swirling. thread may be wrapped about 1 the plurality, of tensioning members as. a

unit when theshuttle is picked and-the-tem isioning members act ithin. theathread wrappings under the ,pull of .the thread and municating therewith, a plurality of thread the swirling thread may be tensioning members having their ends remote from the bobbin chamber secured to the shuttle and their ends adjacent the bobbin chamber free and diverging outwardly that wrapped about the plurality of tensioning members as a unit by the swirling or revolving movement of the unwinding thread on the first pick of the shuttle following replenishment and the tensioning members may act within the thread wrappings to tension the thread and take up slack.

4. An automatically threading loom shuttle having a bobbin chamber, a longitudinal thread passage and a side delivery eye communicating therewith, a plurality of thread tensioning members constituted as resilient arms extending longitudinally of the thread passage having their ends remote from the bobbin chamber secured to the shuttle and their ends adjacent the bobbin chamber tree that the swirling thread may be wrapped about the plurality of tensioning members as a unit by the swirling or revolving movement of the unwinding thread when the shuttle is pick-ed and the tensioning members act within the thread wrappings under the pull of the thread and take up slack.

5. An automatically threading loom shuttle having a bobbin chamber, a longitudinal thread passage, and a side delivery eye communicating therewith, two thread tensioning members, one of which is yieldable towards and from the other and both extending longitudinally of the thread passage with their ends remote from the bobbin chamber secured to the shuttle and having their ends adjacent the bobbin chamber free that the swirling thread may be wrapped about both tensioning members as a unit by the swirling or revolving movement of the unwinding thread when the shuttle is picked and be subjected to tension by the combined action of the tensioning members.

6. An automatically threading loom shuttle having a bobbin chamber, a longitudinal thread passage, and a side delivery eye communicating therewith, two thread tensioning members, one of which is yieldable towards and from the other and both extending longitudinally of the thread passage with their ends remote from the bobbin chamber secured to the shuttle and having their ends adjacent the bobbin chamber free that the swirling thread may be wrapped about both tensioning members as a unit when the shuttle is picked and be subjected to tension by the combined action of the tensioning members, and a thread director at the free ends of the tensioning members for directing the thread about said members.

7. An automatically threading loom shuttle having a bobbin chamber and side delivery eye, a plurality of thread tensioning mem bers between the bobbin chamber and side delivery eye extending longitudinally of the shuttle and having their ends remote from the bobbin chamber secured to the shuttle and their ends adjacent the bobbin chamber free, and a thread director at the free ends of the tensioning members for directing the thread about said tensioning members as a unit when the shuttle is picked following replenishment to cause the thread to be wound upon the tensioning members by the swirling or revolving movement imparted to the thread as it unwinds from the filling supply.

8. An automatically threading loom shuttle having a bobbin chamber, a longitudinal thread passage and a side delivery eye communicating therewith that the shuttle may be automatically threaded, a plurality of thread tensioning members constituted as relatively resilient arms extending longitudinally oi. the thread passage having their ends which are remote from the bobbin chamber secured to the shuttle and their opposite ends free, one of said arms having a curved thread director at its free end that the thread may be wrapped about the plurality of arms as a unit bers constituted as arms extending longitudinally of the thread passage, one of which at least is yieldable towards and from the other and both having their ends remote from the bobbin chamber secured to the shuttle and their opposite ends adjacent the bobbin chamber free and constructed so that the thread will be wrapped about said arms as a unit by the swirling or revolving movement imparted to the thread it unwinds from the filling supply on the first pick of the shuttle following replenishment of filling that the arms may act yieldingly within the thread wrappings to tension the thread and take up slack.

10. An automatically threading loom shuttle having a bobbin chamber, a longitudinal thread passage and a delivery eye communieating therewith, two thread tensioning members constituted as arms extending longitudinally of the thread passage, one of which at least is yieldable towards and from the other has been Wrapped about the tensioning memhers.

In testimony'whereof, I have signed my name to this specification.

CARL D. BROWN. 

